crescent — A crescent is a curved shape that is wider in the middle than at its ends, like the shape of the moon during its first and last quarters. It is the most important symbol of the Islamic faith.
Three-syllable rhymes
depressant — able to diminish or reduce nervous or functional activity
fluorescent — possessing the property of fluorescence; exhibiting fluorescence.
incessant — continuing without interruption; ceaseless; unending: an incessant noise.
quiescent — being at rest; quiet; still; inactive or motionless: a quiescent mind.
suppressant — a substance that suppresses an undesirable action or condition: an appetite suppressant.
Four-or-more syllable rhymes
adolescent — Adolescent is used to describe young people who are no longer children but who have not yet become adults. It also refers to their behaviour.
convalescent — Convalescent means relating to convalescence.